linux/arch/x86/um/sys_call_table_64.c
Andy Lutomirski cfcbadb49d x86/syscalls: Add syscall entry qualifiers
This will let us specify something like 'sys_xyz/foo' instead of
'sys_xyz' in the syscall table, where the 'foo' qualifier conveys
some extra information to the C code.

The intent is to allow things like sys_execve/ptregs to indicate
that sys_execve() touches pt_regs.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/2de06e33dce62556b3ec662006fcb295504e296e.1454022279.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-29 09:46:38 +01:00

56 lines
1.6 KiB
C

/*
* System call table for UML/x86-64, copied from arch/x86/kernel/syscall_*.c
* with some changes for UML.
*/
#include <linux/linkage.h>
#include <linux/sys.h>
#include <linux/cache.h>
#include <generated/user_constants.h>
#include <asm/syscall.h>
#define __NO_STUBS
/*
* Below you can see, in terms of #define's, the differences between the x86-64
* and the UML syscall table.
*/
/* Not going to be implemented by UML, since we have no hardware. */
#define sys_iopl sys_ni_syscall
#define sys_ioperm sys_ni_syscall
/*
* The UML TLS problem. Note that x86_64 does not implement this, so the below
* is needed only for the ia32 compatibility.
*/
/* On UML we call it this way ("old" means it's not mmap2) */
#define sys_mmap old_mmap
#define stub_clone sys_clone
#define stub_fork sys_fork
#define stub_vfork sys_vfork
#define stub_execve sys_execve
#define stub_execveat sys_execveat
#define stub_rt_sigreturn sys_rt_sigreturn
#define __SYSCALL_64(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
#include <asm/syscalls_64.h>
#undef __SYSCALL_64
#define __SYSCALL_64(nr, sym, qual) [ nr ] = sym,
extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
const sys_call_ptr_t sys_call_table[] ____cacheline_aligned = {
/*
* Smells like a compiler bug -- it doesn't work
* when the & below is removed.
*/
[0 ... __NR_syscall_max] = &sys_ni_syscall,
#include <asm/syscalls_64.h>
};
int syscall_table_size = sizeof(sys_call_table);